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  2. Tic-tac-toe - Wikipedia

    en.wikipedia.org/wiki/Tic-tac-toe

    Tic-tac-toe. Tic-tac-toe (American English), noughts and crosses (Commonwealth English), or Xs and Os (Canadian or Irish English) is a paper-and-pencil game for two players who take turns marking the spaces in a three-by-three grid with X or O. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row is ...

  3. Bertie the Brain - Wikipedia

    en.wikipedia.org/wiki/Bertie_the_Brain

    Bertie the Brain was a video game version of tic-tac-toe, built by Dr. Josef Kates for the 1950 Canadian National Exhibition. [1] Kates had previously worked at Rogers Majestic designing and building radar tubes during World War II, then after the war pursued graduate studies in the computing center at the University of Toronto while continuing to work at Rogers Majestic. [2]

  4. Tic-tac-toe variants - Wikipedia

    en.wikipedia.org/wiki/Tic-tac-toe_variants

    Tic-tac-toe variants. A complete game of Notakto, a misère variant of the game. Tic-tac-toe is an instance of an m,n,k-game, where two players alternate taking turns on an m × n board until one of them gets k in a row. [1] Harary's generalized tic-tac-toe is an even broader generalization. The game can also be generalized as a n d game. [2]

  5. First-player and second-player win - Wikipedia

    en.wikipedia.org/wiki/First-player_and_second...

    Diagram showing optimal strategy for tic-tac-toe. With perfect play, and from any initial move, both players can always force a draw. In combinatorial game theory, a two-player deterministic perfect information turn-based game is a first-player-win if with perfect play the first player to move can always

  6. Ultimate tic-tac-toe - Wikipedia

    en.wikipedia.org/wiki/Ultimate_tic-tac-toe

    Since X played in the top-right corner of the small board, O is forced to play their next move in the top-right small board of the larger board (highlighted in red). Ultimate tic-tac-toe (also known as super tic-tac-toe, meta tic-tac-toe or (tic-tac-toe)²[1]) is a board game composed of nine tic-tac-toe boards arranged in a 3 × 3 grid. [2][3 ...

  7. WarGames - Wikipedia

    en.wikipedia.org/wiki/WarGames

    David and Jennifer find that Falken has become despondent, believing that nuclear war is inevitable and as futile as a game of tic-tac-toe between two experienced players. The teenagers convince Falken that he should return to NORAD to stop WOPR. WOPR stages a massive Soviet first strike with hundreds of missiles, submarines, and bombers ...

  8. Breaching experiment - Wikipedia

    en.wikipedia.org/wiki/Breaching_experiment

    Subjects played tic-tac-toe where the experimenter asked the subject to make the first move, then erases that mark and moves it to another square before making the responding move. Subjects were confused by this and interpreted the action as a sexual pass, a comment on their own stupidity, or as the impudence of the experimenter.

  9. Game tree - Wikipedia

    en.wikipedia.org/wiki/Game_tree

    The first two plies of the game tree for tic-tac-toe. The diagram shows the first two levels, or plies, in the game tree for tic-tac-toe. The rotations and reflections of positions are equivalent, so the first player has three choices of move: in the center, at the edge, or in the corner.

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